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/* eazel-theme-hacks.c -- override GtkWidgetClass methods
Copyright (C) 1998 Randy Gordon, Integrand Systems
Copyright (C) 2000 Eazel, Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
$Id: eazel-theme-hacks.c,v 1.4 2001/01/18 01:20:04 jsh Exp $
Authors: Randy Gordon <randy@integrand.com>
John Harper <jsh@eazel.com> */
#include "eazel-theme.h"
/* GTK+ sucks in places. This file contains dubious kludges to
force it to do what we want. */
/* GtkRange code */
static gint
gtk_range_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GtkRange *range;
/* The version of this method in gtkrange.c doesn't work
* when the slider is as wide as the trough.
*/
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_RANGE (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
range = GTK_RANGE (widget);
if (event->window == range->trough)
{
gtk_range_draw_trough (range);
}
else if (event->window == widget->window)
{
gtk_range_draw_background (range);
}
else if (event->window == range->slider)
{
gtk_range_draw_slider (range);
}
else if (event->window == range->step_forw)
{
gtk_range_draw_step_forw (range);
}
else if (event->window == range->step_back)
{
gtk_range_draw_step_back (range);
}
return FALSE;
}
/* GtkWidgetClass method-override framework */
typedef struct {
GtkType (*get_type) (void);
int offset;
gpointer replacement;
gpointer original;
} eazel_engine_class_hack;
static eazel_engine_class_hack class_hacks[] = {
{ gtk_range_get_type,
G_STRUCT_OFFSET (GtkWidgetClass, expose_event),
gtk_range_expose },
{ gtk_scale_get_type,
G_STRUCT_OFFSET (GtkWidgetClass, expose_event),
gtk_range_expose },
{ NULL }
};
void
eazel_engine_install_hacks (void)
{
eazel_engine_class_hack *hack;
for (hack = class_hacks; hack->get_type != 0; hack++)
{
GtkWidgetClass *klass = gtk_type_class (hack->get_type ());
hack->original = G_STRUCT_MEMBER (gpointer, klass, hack->offset);
G_STRUCT_MEMBER (gpointer, klass, hack->offset) = hack->replacement;
}
}
static void
restore_funcs (GtkObjectClass *klass,
int member_offset,
gpointer find_func,
gpointer replace_func)
{
GList *child_list, *child;
if (!GTK_IS_WIDGET_CLASS (klass))
g_error ("Warning: restoring methods for non-widget");
else
{
GtkWidgetClass *widget_klass = GTK_WIDGET_CLASS (klass);
if (G_STRUCT_MEMBER (gpointer, widget_klass, member_offset) == find_func)
G_STRUCT_MEMBER (gpointer, widget_klass, member_offset) = replace_func;
}
child_list = gtk_type_children_types (klass->type);
for (child = child_list; child; child = child->next)
{
gpointer child_class = gtk_type_class (GPOINTER_TO_UINT (child->data));
restore_funcs (GTK_OBJECT_CLASS (child_class),
member_offset, find_func, replace_func);
}
}
void
eazel_engine_remove_hacks (void)
{
eazel_engine_class_hack *hack;
for (hack = class_hacks; hack->get_type != 0; hack++)
{
/* This is nasty: the methods we installed in init() may have
been copied into subclasses. */
GtkWidgetClass *klass = gtk_type_class (hack->get_type ());
restore_funcs (GTK_OBJECT_CLASS (klass), hack->offset,
hack->replacement, hack->original);
}
}
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